Just to prove that I screw up (often), here's a problem for which I can't figure out a solution.

I like to put those electric "candles" in the windows over the Holidays. Joyce doesn't. She's concerned that the cat or dog will knock one off the window sill and start a fire or, at the least, get glass in their paws from the broken bulb.

So, this past season, I decided to build a wooden "bracket" that would slide over the edge of the window sill and, if necessary, be screwed into the bottom of the window sill.

So, I checked the thickness of the sills, built a prototype, and tried it on five different windows. Perfect. I bought the wood and setup a little assembly line to make them all. I glued the pieces together. And they didn't fit.

They are made from equal-length pieces of (IIRC) 1X6, 1x2 and 1X4. The 1X2 is the "spacer" that determines how tightly the top and bottom pieces hug the windowsill. And, evidently, the 1X2s I bought and used to build these were not quite as thick as the one in the prototype I built.

Now, I can throw these in the trash and start over. But I also figured I could save these by taking some of the thickness off the area marked in green or the area marked in red.

This is the candle holder shown upside-down:

I tried using a grinder with a sanding disc on the "red" area. But I couldn't get all the way into the corner as needed. I just tried using bench chisels on the green section, but either it was messy going against the grain or, with the grain, I couldn't get the chisel into position.

So.....

Can anyone think of a tool that could "get into the groove" and remove wood from the green section or the red section?

I've been keeping all of these in a bin in my workshop while I try to think of a solution.

As I type this, I'm thinking more and more that I should throw them out and start again.

Do you have a M/T jig? If you did, you'd just clamp piece to it, set the distance to the TS blade and rip away. If you don't have a jig, you can sill figure out how to run the piece by the TS blade, keeping it at 90 deg, but not pinching the work between the blade and the fence.

That's actually a good idea. Cat. I hadn't thought of that. I'll have to see how small the nails are that I used, but an old blade that goes through nails safely might do the trick if they were small-gauge pins.